<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name" />
      </el-form-item>

      <el-form-item label="讲师排序">
        <el-input-number
          v-model="teacher.sort"
          controls-position="right"
          min="0"
        />
      </el-form-item>

      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--

          数据类型一定要和取出的json中的一致，否则没法回填

          因此，这里value使用动态绑定的值，保证其数据类型是number

        -->

          <el-option :value="1" label="高级讲师" />

          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>

      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" />
      </el-form-item>

      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea" />
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->

        <pan-thumb :image="teacher.avatar" />

        <!-- 文件上传按钮 -->

        <el-button
          type="primary"
          icon="el-icon-upload"
          @click="imagecropperShow = true"
          >更换头像
        </el-button>

        <!--

v-show：是否显示上传组件
:key：类似于id，如果一个页面多个图片上传控件，可以做区分
:url：后台上传的url地址
@close：关闭上传组件
@crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API + '/eduoss/fileoss'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"
        />
      </el-form-item>

      <!-- 保存按钮 -->
      <el-form-item>
        <el-button
          :disabled="saveBtnDisabled"
          type="primary"
          @click="saveOrUpdate"
          >保存</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from "@/api/edu/teacher";
//引入上传组件
import ImageCropper from "@/components/ImageCropper";
import PanThumb from "@/components/PanThumb";

export default {
  //声明上传组件
  components: { ImageCropper, PanThumb },

  data() {
    return {
      teacher: {
        //里边的属性可加可不加
        name: "",
        sort: 0,
        level: 1,
        career: "",
        intro: "",
        // avatar: process.env.OSS_PATH +'/R-C.jfif'//默认头像
        avatar: ""
      },
      saveBtnDisabled: false, //保存按钮是否被禁用，预防重复提交

      imagecropperShow: false, //是否显示上传组件
      imagecropperKey: 0, //上传组件的key
      BASE_API: process.env.BASE_API // 接口API地址
    };
  },
  created() {
    this.init();
  },
  watch: {
    //监听路由转换
    $route(to, from) {
      this.init(); //路由转换时重新执行init方法，为了解决由修改直接到添加时回显的数据没有擦除（teacher置空失败）的问题
    },
  },

  methods: {
    cropSuccess(data) {
      //上传成功
      //关闭弹窗
      this.imagecropperShow = false;
      this.teacher.avatar = data.url; 
      console.log(data.url);

      // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
      this.imagecropperKey = this.imagecropperKey + 1;
    },
    close() {
      //关闭上传弹窗
      this.imagecropperShow = false;
      //上传组件初始化
      this.imagecropperKey = this.imagecropperKey + 1;
    },
    init() {
      if (this.$route.params && this.$route.params.id) {
        this.avatar = process.env.OSS_PATH + "/R-C.jfif";
        //因为保存和修改公用一个表格，所以需要判断，如果有id,则调用回显方法
        const id = this.$route.params.id;
        this.getTeacherInfo(id);
      } else {
        //清空表单
        this.teacher = {};
        this.teacher.sort=0
        //设置默认头像
        this.teacher.avatar="https://edu-fosss.oss-cn-beijing.aliyuncs.com/R-C.jfif"

      }
    },
    //添加修改的保存按钮都调用这个方法，需要根据teacher中是否有id判断具体是哪个方法
    saveOrUpdate() {
      this.saveBtnDisabled = true; //禁用保存按钮，防止重复提交

      if (this.teacher.id) {
        this.updateTeacher();
      } else {
        this.saveTeacher();
      }
    },
    saveTeacher() {
      teacherApi.save(this.teacher).then((res) => {
        //给出提示信息
        this.$message({
          type: "success",
          message: "添加成功!",
        });

        //跳转到列表页面
        this.$router.push({ path: "/teacher/table" });
      });
    },
    getTeacherInfo(id) {
      //用于数据回显
      teacherApi.getById(id).then((res) => {
        this.teacher = res.data.teacher;
      });
    },
    updateTeacher() {
      teacherApi.update(this.teacher).then((res) => {
        //给出提示信息
        this.$message({
          type: "success",
          message: "修改成功!",
        });

        //跳转到列表页面
        this.$router.push({ path: "/teacher/table" });
      });
    },
  },
};
</script>

